A pulse has a speed of 5cm. s^-1. How far does it travel in 2,5s?

Explanation:

We are asked to find how far a pulse travels or the distance. Distance is the product of speed and time.

The speed of the plus is 5 centimeters per second and the time is 2.5 seconds.

s= 5 cm/s t= 2.5 s

Substitute the values into the formula.

Multiply. Note that the units of seconds will cancel each other out.

The pulse travels 12.5 centimeters.

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -